Determining the rate that the area of a triangle is increasing based on the rate an angle is increasing

Using trigonometric substitution to evaluate an indefinite integral

Using trigonometric substitution to evaluate an indefinite integral

Using trigonometric substitution to evaluate an indefinite integral

Using trigonometric substitution to evaluate an indefinite integral

Using trigonometric substitution to evaluate a definite integral

Using trigonometric substitution to evaluate a definite integral

Using trigonometric substitution to evaluate an indefinite integral

Using trigonometric substitution to evaluate an indefinite integral